Patch "xfs: validate block number being freed before adding to xefi" has been added to the 6.1-stable tree
<[email protected]> Sun, 16 Mar 2025 07:17:08 +0100
| Newsgroups | dev.linux.lists.xfs-stable |
|---|---|
| Message-ID | <2025031608-bottle-wick-7a0f@gregkh> |
This is a note to let you know that I've just added the patch titled
xfs: validate block number being freed before adding to xefi
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xfs-validate-block-number-being-freed-before-adding-to-xefi.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
From [email protected] Thu Mar 13 21:26:20 2025
From: Leah Rumancik <[email protected]>
Date: Thu, 13 Mar 2025 13:25:26 -0700
Subject: xfs: validate block number being freed before adding to xefi
To: [email protected]
Cc: [email protected], Dave Chinner <[email protected]>, Christoph Hellwig <[email protected]>, "Darrick J. Wong" <[email protected]>, Dave Chinner <[email protected]>, Leah Rumancik <[email protected]>
Message-ID: <[email protected]>
From: Dave Chinner <[email protected]>
[ Upstream commit 7dfee17b13e5024c5c0ab1911859ded4182de3e5 ]
Bad things happen in defered extent freeing operations if it is
passed a bad block number in the xefi. This can come from a bogus
agno/agbno pair from deferred agfl freeing, or just a bad fsbno
being passed to __xfs_free_extent_later(). Either way, it's very
difficult to diagnose where a null perag oops in EFI creation
is coming from when the operation that queued the xefi has already
been completed and there's no longer any trace of it around....
Signed-off-by: Dave Chinner <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Darrick J. Wong <[email protected]>
Signed-off-by: Dave Chinner <[email protected]>
Signed-off-by: Leah Rumancik <[email protected]>
Acked-by: "Darrick J. Wong" <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
fs/xfs/libxfs/xfs_ag.c | 5 ++++-
fs/xfs/libxfs/xfs_alloc.c | 16 +++++++++++++---
fs/xfs/libxfs/xfs_alloc.h | 6 +++---
fs/xfs/libxfs/xfs_bmap.c | 10 ++++++++--
fs/xfs/libxfs/xfs_bmap_btree.c | 7 +++++--
fs/xfs/libxfs/xfs_ialloc.c | 24 ++++++++++++++++--------
fs/xfs/libxfs/xfs_refcount.c | 13 ++++++++++---
fs/xfs/xfs_reflink.c | 4 +++-
8 files changed, 62 insertions(+), 23 deletions(-)
--- a/fs/xfs/libxfs/xfs_ag.c
+++ b/fs/xfs/libxfs/xfs_ag.c
@@ -906,7 +906,10 @@ xfs_ag_shrink_space(
if (err2 != -ENOSPC)
goto resv_err;
- __xfs_free_extent_later(*tpp, args.fsbno, delta, NULL, true);
+ err2 = __xfs_free_extent_later(*tpp, args.fsbno, delta, NULL,
+ true);
+ if (err2)
+ goto resv_err;
/*
* Roll the transaction before trying to re-init the per-ag
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -2485,7 +2485,7 @@ xfs_agfl_reset(
* the real allocation can proceed. Deferring the free disconnects freeing up
* the AGFL slot from freeing the block.
*/
-STATIC void
+static int
xfs_defer_agfl_block(
struct xfs_trans *tp,
xfs_agnumber_t agno,
@@ -2504,16 +2504,20 @@ xfs_defer_agfl_block(
xefi->xefi_blockcount = 1;
xefi->xefi_owner = oinfo->oi_owner;
+ if (XFS_IS_CORRUPT(mp, !xfs_verify_fsbno(mp, xefi->xefi_startblock)))
+ return -EFSCORRUPTED;
+
trace_xfs_agfl_free_defer(mp, agno, 0, agbno, 1);
xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_AGFL_FREE, &xefi->xefi_list);
+ return 0;
}
/*
* Add the extent to the list of extents to be free at transaction end.
* The list is maintained sorted (by block number).
*/
-void
+int
__xfs_free_extent_later(
struct xfs_trans *tp,
xfs_fsblock_t bno,
@@ -2540,6 +2544,9 @@ __xfs_free_extent_later(
#endif
ASSERT(xfs_extfree_item_cache != NULL);
+ if (XFS_IS_CORRUPT(mp, !xfs_verify_fsbext(mp, bno, len)))
+ return -EFSCORRUPTED;
+
xefi = kmem_cache_zalloc(xfs_extfree_item_cache,
GFP_KERNEL | __GFP_NOFAIL);
xefi->xefi_startblock = bno;
@@ -2561,6 +2568,7 @@ __xfs_free_extent_later(
XFS_FSB_TO_AGNO(tp->t_mountp, bno), 0,
XFS_FSB_TO_AGBNO(tp->t_mountp, bno), len);
xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_FREE, &xefi->xefi_list);
+ return 0;
}
#ifdef DEBUG
@@ -2720,7 +2728,9 @@ xfs_alloc_fix_freelist(
goto out_agbp_relse;
/* defer agfl frees */
- xfs_defer_agfl_block(tp, args->agno, bno, &targs.oinfo);
+ error = xfs_defer_agfl_block(tp, args->agno, bno, &targs.oinfo);
+ if (error)
+ goto out_agbp_relse;
}
targs.tp = tp;
--- a/fs/xfs/libxfs/xfs_alloc.h
+++ b/fs/xfs/libxfs/xfs_alloc.h
@@ -213,7 +213,7 @@ xfs_buf_to_agfl_bno(
return bp->b_addr;
}
-void __xfs_free_extent_later(struct xfs_trans *tp, xfs_fsblock_t bno,
+int __xfs_free_extent_later(struct xfs_trans *tp, xfs_fsblock_t bno,
xfs_filblks_t len, const struct xfs_owner_info *oinfo,
bool skip_discard);
@@ -233,14 +233,14 @@ struct xfs_extent_free_item {
#define XFS_EFI_ATTR_FORK (1U << 1) /* freeing attr fork block */
#define XFS_EFI_BMBT_BLOCK (1U << 2) /* freeing bmap btree block */
-static inline void
+static inline int
xfs_free_extent_later(
struct xfs_trans *tp,
xfs_fsblock_t bno,
xfs_filblks_t len,
const struct xfs_owner_info *oinfo)
{
- __xfs_free_extent_later(tp, bno, len, oinfo, false);
+ return __xfs_free_extent_later(tp, bno, len, oinfo, false);
}
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -572,8 +572,12 @@ xfs_bmap_btree_to_extents(
cblock = XFS_BUF_TO_BLOCK(cbp);
if ((error = xfs_btree_check_block(cur, cblock, 0, cbp)))
return error;
+
xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork);
- xfs_free_extent_later(cur->bc_tp, cbno, 1, &oinfo);
+ error = xfs_free_extent_later(cur->bc_tp, cbno, 1, &oinfo);
+ if (error)
+ return error;
+
ip->i_nblocks--;
xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
xfs_trans_binval(tp, cbp);
@@ -5202,10 +5206,12 @@ xfs_bmap_del_extent_real(
if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) {
xfs_refcount_decrease_extent(tp, del);
} else {
- __xfs_free_extent_later(tp, del->br_startblock,
+ error = __xfs_free_extent_later(tp, del->br_startblock,
del->br_blockcount, NULL,
(bflags & XFS_BMAPI_NODISCARD) ||
del->br_state == XFS_EXT_UNWRITTEN);
+ if (error)
+ goto done;
}
}
--- a/fs/xfs/libxfs/xfs_bmap_btree.c
+++ b/fs/xfs/libxfs/xfs_bmap_btree.c
@@ -285,11 +285,14 @@ xfs_bmbt_free_block(
struct xfs_trans *tp = cur->bc_tp;
xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, xfs_buf_daddr(bp));
struct xfs_owner_info oinfo;
+ int error;
xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, cur->bc_ino.whichfork);
- xfs_free_extent_later(cur->bc_tp, fsbno, 1, &oinfo);
- ip->i_nblocks--;
+ error = xfs_free_extent_later(cur->bc_tp, fsbno, 1, &oinfo);
+ if (error)
+ return error;
+ ip->i_nblocks--;
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L);
return 0;
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -1827,7 +1827,7 @@ xfs_dialloc(
* might be sparse and only free the regions that are allocated as part of the
* chunk.
*/
-STATIC void
+static int
xfs_difree_inode_chunk(
struct xfs_trans *tp,
xfs_agnumber_t agno,
@@ -1844,10 +1844,10 @@ xfs_difree_inode_chunk(
if (!xfs_inobt_issparse(rec->ir_holemask)) {
/* not sparse, calculate extent info directly */
- xfs_free_extent_later(tp, XFS_AGB_TO_FSB(mp, agno, sagbno),
- M_IGEO(mp)->ialloc_blks,
- &XFS_RMAP_OINFO_INODES);
- return;
+ return xfs_free_extent_later(tp,
+ XFS_AGB_TO_FSB(mp, agno, sagbno),
+ M_IGEO(mp)->ialloc_blks,
+ &XFS_RMAP_OINFO_INODES);
}
/* holemask is only 16-bits (fits in an unsigned long) */
@@ -1864,6 +1864,8 @@ xfs_difree_inode_chunk(
XFS_INOBT_HOLEMASK_BITS);
nextbit = startidx + 1;
while (startidx < XFS_INOBT_HOLEMASK_BITS) {
+ int error;
+
nextbit = find_next_zero_bit(holemask, XFS_INOBT_HOLEMASK_BITS,
nextbit);
/*
@@ -1889,8 +1891,11 @@ xfs_difree_inode_chunk(
ASSERT(agbno % mp->m_sb.sb_spino_align == 0);
ASSERT(contigblk % mp->m_sb.sb_spino_align == 0);
- xfs_free_extent_later(tp, XFS_AGB_TO_FSB(mp, agno, agbno),
- contigblk, &XFS_RMAP_OINFO_INODES);
+ error = xfs_free_extent_later(tp,
+ XFS_AGB_TO_FSB(mp, agno, agbno),
+ contigblk, &XFS_RMAP_OINFO_INODES);
+ if (error)
+ return error;
/* reset range to current bit and carry on... */
startidx = endidx = nextbit;
@@ -1898,6 +1903,7 @@ xfs_difree_inode_chunk(
next:
nextbit++;
}
+ return 0;
}
STATIC int
@@ -1998,7 +2004,9 @@ xfs_difree_inobt(
goto error0;
}
- xfs_difree_inode_chunk(tp, pag->pag_agno, &rec);
+ error = xfs_difree_inode_chunk(tp, pag->pag_agno, &rec);
+ if (error)
+ goto error0;
} else {
xic->deleted = false;
--- a/fs/xfs/libxfs/xfs_refcount.c
+++ b/fs/xfs/libxfs/xfs_refcount.c
@@ -1129,8 +1129,10 @@ xfs_refcount_adjust_extents(
fsbno = XFS_AGB_TO_FSB(cur->bc_mp,
cur->bc_ag.pag->pag_agno,
tmp.rc_startblock);
- xfs_free_extent_later(cur->bc_tp, fsbno,
+ error = xfs_free_extent_later(cur->bc_tp, fsbno,
tmp.rc_blockcount, NULL);
+ if (error)
+ goto out_error;
}
(*agbno) += tmp.rc_blockcount;
@@ -1188,8 +1190,10 @@ xfs_refcount_adjust_extents(
fsbno = XFS_AGB_TO_FSB(cur->bc_mp,
cur->bc_ag.pag->pag_agno,
ext.rc_startblock);
- xfs_free_extent_later(cur->bc_tp, fsbno,
+ error = xfs_free_extent_later(cur->bc_tp, fsbno,
ext.rc_blockcount, NULL);
+ if (error)
+ goto out_error;
}
skip:
@@ -1958,7 +1962,10 @@ xfs_refcount_recover_cow_leftovers(
rr->rr_rrec.rc_blockcount);
/* Free the block. */
- xfs_free_extent_later(tp, fsb, rr->rr_rrec.rc_blockcount, NULL);
+ error = xfs_free_extent_later(tp, fsb,
+ rr->rr_rrec.rc_blockcount, NULL);
+ if (error)
+ goto out_trans;
error = xfs_trans_commit(tp);
if (error)
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -618,8 +618,10 @@ xfs_reflink_cancel_cow_blocks(
xfs_refcount_free_cow_extent(*tpp, del.br_startblock,
del.br_blockcount);
- xfs_free_extent_later(*tpp, del.br_startblock,
+ error = xfs_free_extent_later(*tpp, del.br_startblock,
del.br_blockcount, NULL);
+ if (error)
+ break;
/* Roll the transaction */
error = xfs_defer_finish(tpp);
Patches currently in stable-queue which might be from [email protected] are
queue-6.1/xfs-fix-confusing-xfs_extent_item-variable-names.patch
queue-6.1/xfs-fix-32-bit-truncation-in-xfs_compute_rextslog.patch
queue-6.1/xfs-transfer-recovered-intent-item-ownership-in-iop_recover.patch
queue-6.1/xfs-initialise-di_crc-in-xfs_log_dinode.patch
queue-6.1/xfs-consider-minlen-sized-extents-in-xfs_rtallocate_extent_block.patch
queue-6.1/xfs-don-t-leak-recovered-attri-intent-items.patch
queue-6.1/xfs-remove-unused-fields-from-struct-xbtree_ifakeroot.patch
queue-6.1/xfs-fix-bounds-check-in-xfs_defer_agfl_block.patch
queue-6.1/xfs-ensure-logflagsp-is-initialized-in-xfs_bmap_del_extent_real.patch
queue-6.1/xfs-convert-rt-bitmap-extent-lengths-to-xfs_rtbxlen_t.patch
queue-6.1/xfs-pass-refcount-intent-directly-through-the-log-intent-code.patch
queue-6.1/xfs-fix-perag-leak-when-growfs-fails.patch
queue-6.1/xfs-pass-the-xfs_defer_pending-object-to-iop_recover.patch
queue-6.1/xfs-update-dir3-leaf-block-metadata-after-swap.patch
queue-6.1/xfs-use-deferred-frees-for-btree-block-freeing.patch
queue-6.1/xfs-make-rextslog-computation-consistent-with-mkfs.patch
queue-6.1/xfs-pass-xfs_extent_free_item-directly-through-the-log-intent-code.patch
queue-6.1/xfs-move-the-xfs_rtbitmap.c-declarations-to-xfs_rtbitmap.h.patch
queue-6.1/xfs-recompute-growfsrtfree-transaction-reservation-while-growing-rt-volume.patch
queue-6.1/xfs-reserve-less-log-space-when-recovering-log-intent-items.patch
queue-6.1/xfs-pass-the-xfs_bmbt_irec-directly-through-the-log-intent-code.patch
queue-6.1/xfs-force-all-buffers-to-be-written-during-btree-bulk-load.patch
queue-6.1/xfs-reset-xfs_attr_incomplete-filter-on-node-removal.patch
queue-6.1/xfs-add-lock-protection-when-remove-perag-from-radix-tree.patch
queue-6.1/xfs-use-xfs_defer_pending-objects-to-recover-intent-items.patch
queue-6.1/xfs-pass-per-ag-references-to-xfs_free_extent.patch
queue-6.1/xfs-validate-block-number-being-freed-before-adding-to-xefi.patch
queue-6.1/xfs-don-t-allow-overly-small-or-large-realtime-volumes.patch
queue-6.1/xfs-remove-conditional-building-of-rt-geometry-validator-functions.patch